Java short message function

You can send short messages through the SMS interface of your service provider. It's easier. Generally, after spending money to buy the number of short messages sent, the service provider will give you interface documents and development packages. Just follow the call interface.

Advantages: easy development, unlimited quantity and low price.

Disadvantages SMS is sometimes seriously delayed, and some SMS messages are lost after being sent.

It can also be sent by GSMmodem or GMS cat pool, and the principle is the same as that of sending SMS by mobile phone. When you buy a cat or a cat pool, people will give you interface documents, and the rest will be developed by yourself. This method needs to know more. Including communication between java and hardware.

Advantages SMS will arrive soon, and SMS will generally not be lost.

Shortcomings are more troublesome to develop. Operators have restrictions on the number of transmissions (if it exceeds a certain number, it will not be sent), and the price is higher.